Cutting-head on hair cutting machine



July 12, 1966 G. KLINDER 3,259,979

CUTTING-HEAD ON HAIR CUTTING MACHINE Filed Sept. 1, 1964 United States Patent,

9 Claims. 61. 30-201 This invention relates to an arrangement for the cutter heads on hair cutting machines and particularly to a cutter head having an attached revolving guide, to secure a uniform hair gradiation by reliable guiding of the cutter head.

Several suggestions have been made to provide the cutter heads of the hair cutting machines with attached sliding rollers and such like, which basically are cylindrical or in the form of wheels or runners. However, with cutter heads of this kind, it is difficult or impossible to secure a uniform hair gradiation.

The object of the invention is to provide a cutter head for a hair cutting machine having an arrangement to secure a uniform gradiation of hair cutting and to facilitate a smooth manual operation of hair cutting.

A characteristic feature of the invention is that means for guiding the cutter head is provided by using the roller arrangement of a single roller having a slightly conical shape and rotatably supported on the cutter head of a hair cutting machine. This roller is supported by the supporting member attached to the lower portion of the cutter head of the hair cutting machine so as to avoid a parallel relation between the outside longitudinal profile line of said roller and the profile line of the flat base of said cutter head as viewed in the longitudinal direction ofthe cutting head. This roller arrangement provides the function of a three point support which is stable in every position so that no tilting sideways of the cutter head can occur. The two points move on the surface of the plane of the cutter head, and the third point moves on the surface of the conical roller more or less inward or outward, according to the shape of the head to be treated.

'Due to the conical shape of the roller and the easily controllable wave form roller movement, the same slope is thereby always secured so that a uniform hair gradiation is attained. A deviation from the way directed by the conical shape of the roller is soon noticed in the holding hand of the operator by an increase in the resistance. The increased resistance thereby makes itself more noticeable and the movement of the roller becomes too slow so that the operator can follow the way naturally directed. Moreover, the swivelling movement of the conical shaped roller causes the hair to be lifted through the teeth of the cutter head, whereby the function of the hitherto indispensable comb is largely taken over.

By the invention, the time required for cutting the hair is also reduced while at the same time the effort required is less as compared with the use of known cutter heads, in that the grip on the cutter is loosened, so that the performace of work is less tiring than the case has been up to now. The hair cutting can then be carried out according to the free judgement of the operator. Thereis no need for retraining the operator. The hair gradi-ation when using the conical roller in the corresponding guiding of the hair cutting machine is extremely uniform so that it is in principle impossible to cut hair in stages or steps. Hence not only the use of the comb but also the use of the scissors can be dispensed with to a large extent. The hair cutting now feels pleasant for the customer who also benefits from the less time that is required.

The arrangement according to the invention is suitable for medium and long styling, further for child styling, finally for short cuts and fashion hair cuts in the same way for gentlemen as for ladies.

Other features of arrangement and modification of the invention will more fully appear from the following description and accompanying drawings and will be particularly pointed out in the claims.

FIG. 1 is a bottom view of an example of the hair cutting head fitted with the roller component according to the invention;

FIG. 2 shows a side view of the same cutter head;

FIGS. 3, 4 and 5 show bottom side and end elevational views respectively of the carriage type component with the roller omitted;

FIGS. 6, 7 and 8 show further details, drawn separately, such as an axle pin, a conical roller, and a reinforcement, respectively.

As shown in these drawings, an arrangement for the cutter head of a hair cutting machine of this invention comprises a hair cutter head 1 having a flat base portion, a roller support which is shown as a metal sliding carriage 2, a conical roller 3 and an axle pin 4.

As shown in FIGS. 1, 2 and 5, the axle pin 4 is supported by the lugs 2' in a parallel relation to the fiat surface of the sliding carriage 2 and the hair cutter head \1. Therefore, the foregoing function of the three point support is provided with two points existing on the plane surface of the sliding carriage 2 and a point existing on the surface of the conical shaped roller 3. The position of these three points of support move according to the shape of head to be treated. By this three point support, the hair cutting machine can be supported in stable condition and also provides the function of reliable guidmg. a

The sliding carriage 2 is shown as being U-shaped and has a pair of projecting holding outer flanges 2a which are slidably attached to opposite sides of a lower portion of the hair cutting machine by an exchangeable adjustable dovetail means, and has a pair of lugs 2' at right angles to the flat surface of the sliding carriage 2 on the opposite side to said holding outer flanges.

These holding outer flanges extend to form a pair of holding components or holding noses 6 respectively, and the nose 6 forms a U-shape with the flat base portion of the supporting carriage 2 so as to fit a comb part of the lower cutting comb of the cutting machine. The width of the flange is comparatively small compared with the longitudinal dimension of the same, but enough to enclose the lower cutting comb.

If the sliding carriage is made by stamping, the supporting lugs 2' are punched at the outer ends of the sliding carriage and bent at an angle. 'In this event, reinforcement pieces 5 corresponding in shape to the supporting lug 2' can be provided. If the sliding carriage is provided by die casting, the parts 2, 2' and 5 are preferably made as one single piece of material.

The axle pin 4, which carries the conical roller 3 that revolves round it and is mounted in the lugs 2' of the sliding carriage 2, is preferably provided at one end with a thread 4a so that it can be introduced into a threaded hole of one of the lugs 2', and at its opposite end has a screwdriver slot 4b, as shown in FIG. 4. In this way, the axle pin 4 with the conical roller 3 can be easily introduced into the axle holes of the supporting lugs. It is also possile to use two axle ends instead of one single axle pin.

Instead of a design in which the conical roller 3 is supported by the supporting lugs 2' of sliding carriage 2, the support for pivots for the roller may be provided directly on the fower cutting comb, i.e., omitting the foregoing sliding carriage 2. By this arrangement of the conical roller, the foregoing threepoints of support of the lower cutter head is also provided. In both designs, i.e., with a sliding carriage or without one, the roller can be are ranged either as shown perpendicularly to the longitudinal axis of symmetry of the cutter head or inclined at an angle in relation to it, for example of 3 to 5 degrees.

The roller 3 is preferably made of durable material such as plastic, hardwood, metal, plastic impregnated material and plastic covered material. 7 The dimensions and shape of the sliding roller are especially important.v It has hereby been found to be particularly advantageous when the longitudinal profile line defined by the sunface of the roller remote from the :base of the cutting head is inclined at an angle of the order of 3 to 5 degrees to the base of the cutting head. Preferably the ratio of the largest to the smallest diameter of the conical sliding roller is approximately 5:3. Thus for instance the largest roller diameter can .be 10 mm. and the smallest diameter of the same roller 6 mm. in the case of a roller having a length of 42 mm. The conical roller can, according to preference of the operator, 'be mounted so that it is inclined either to 'the left or the right.

It is intended, therefore, that all matter contained in the foregoing description and in the drawings shall be interpreted as illustrative only, not as limitation of the invention.

I claim:

1. In a hair cutting head having a flat base, the improvement comprising a revolving guide consisting of a single roller, and mean-s rotatably supporting said roller below said base and transversely of the longitudinal axis of symmetry of the cutting head, said roller being slightly conical so that the longitudinal profile line defined by the surface element of the roller remote from the base is inclined relative to said base.

2. A hair cutting head according to claim '1, in which the angle of inclination of said profile line to the base is of the order of 3 to 5.

i 3. A hair cutting head according to claim 1, in which the ratio of the largest diameter to the smallest diameter of said conical roller is of the order of five to three.

4. A hair cutting head according to claim 1, in which the axis of said roller is substantially perpendicular to the longitudinal axis of symmetry of said head.

5. A hair cutting head according to claim :1, in which the axis of said roller is inclined to the longitudinalaxis of symmetry of said head.

6. A hair cutting head comprising a flat baseportion, a sliding carriage mounted on said base portion to slide in the direction of the longitudinal axis'of symmetry of said head, said slide having at opposite sides roller supporting lugs projecting downwardly from said carriage and from said carriage and a guiding roller rotatably supported by said logs in a position below said carriage and transverse to said longitudinal axis, said guiding roller being slightly conical so that the longitudinal profile line defined by the surface element of the roller remote from said carriage is inclined relative to said carirage.

7. A hair cutting head according to claim 6, in which an axle extending through said roller is slidably received in a hole in one of said lugs and has a threaded end portion screwed into a threaded hole in the opposite lug.

8. A hair cutting head according to claim 6, in which said head comprises a lower cutting comb and in which said sliding carriage has at its opposite sides narrow flanges slidably engaging said lower cutting comb in dovc-' tailed relation.

9. A hair cutting head according to claim 8, in which said sliding carriage including said flanges and lugs com sists of a single metal stamping and in which means is provided reinforcing said lugs. 

1. IN A HAIR CUTTING HEAD HAVING A FLAT BASE, THE IMPROVEMENT COMPRISING A REVOLVING GUIDE CONSISTING OF A SINGLE ROLLER, AND MEANS ROTATABLY SUPPORTING SAID ROLLER BELOW SAID BLADE AND TRANSVERSELY OF THE LONGITUDINALLY AXIS OF SYMMETRY OF THE CUTTING HEAD, SAID ROLLER BEING SLIGHTLY CONICAL SO THAT THE LONGITUDINAL PROFILE LINE DEFINED BY THE SURFACE ELEMENT OF THE ROLLER REMOTE FROM THE BASE IS INCLINED RELATIVE TO SAID BASE. 